The SRL-EXT was tailored specifically for the SHOEI NXR2 helmet. The shape of the SRL-EXT main module and external battery are curved to match the exterior curves of the NXR2. The SRL-EXT main module is installed on the left side of the helmet, while the external battery adheres to the right side of the helmet.
Communication system by SENA, protection by SHOEI, and SOUND BY Harman Kardon. The SRL-EXT was custom designed for one of SHOEI’s most beloved helmets, the NXR2. The compact SRL-EXT offers both Mesh and Bluetooth intercom plus smartphone connectivity for music, GPS, phone calls, and more. SRL-EXT users will experience premium SOUND BY Harman Kardon audio inside of their SHOEI NXR2.

The SRL-EXT offers premium features including:
- SOUND BY Harman Kardon speakers and mic
- Designed specifically to fit the SHOEI NXR2
- Bluetooth 5
- Mesh Intercom™
- 4-way Bluetooth® Intercom
- Digital Assistant Access
- Advanced Noise Control™